Improvements relating to registering mechanisms



June 13, 1939. J FRASER 2,161,919

IMPROVEMENTS RELATING TO REGISTERING'MECHANISMS Filed June 26, 1937 3 Sheets-Sheet l I finkenform Mn. M

June 13, 1939. FRASER 2,161,919

IMPROVEMENTS RELATING TO REGISTERING MECHANISMS Filed June 26, 1937 3 Sheets- Sheet 2 June 13, 1939. FRASER 2,161,919

IMPROVBIBNIS RELATING TO REGISTERING MECHANISMS Filed June 26, 1937 3 Sheets-Sheet 3 Patented June 13, 1939 UNITED STATES IMPROVEMENTS RELATING TO REGISTER- ING MECHANISMS John Fraser, London, England, aaig'nor to Avery- Hardoll Limited, London, England Application June 26, 1937, Serial No. 150,635 In Great Britain July 10, 1936 Claim.

This invention has reference to improvements relating to registering mechanism and is concerned more particularly with registering mechanism of the kind in which a plurality of indi- 5 eating drums are employed which are driven from one another by interrupted toothed gearing.

The present invention has for its object the provision of an improved means which enables the severaldrums of a mechanism as aforesaid to be readily zeroised as and when required by-.a

backward movement of the drums.

A convenient embodiment of the invention will now be described with particular reference to the accompanying drawings which illustrate the invention in its application to a price registering mechanism especially intended for use with liquid measuring and dispensing apparatus for liquid fuels for internal combustion engines, the said apparatus being of the flow meter type.

0 In the drawings:

Figure 1 is a longitudinal vertical section of sufllcient of the improved price indicating mechanism as is necessary to an understanding of the invention.

85 Figure 1- is a diagrammatic representation of the indicating and zerolsing mechanism, and

Figure 1 is a fragmentary view of part of the zerolsing mechanism illustrated in Figure 1.

Figure 2 is an end view of the mechanism illustrated in Figure 1 looking in the direction of the arrow, and

Figure 3 is a transverse section taken on the plane indicated by the line 3--3 Figure 1 looking in the direction of the arrows to said line.

According to the said embodiment of the invention the price registering mechanism comprises three drums A, B and C. one A for pence, one B for shillings and the other C for tens of shillings. Each of these drums A, B and C, is

freely mounted on a rotatable tubular shaft 4 which is driven from he flow meter in the manner disclosed in our British complete specification No. 465,347. The pence drum- A has incorporated therewith a one-way driving device for driving the said drum A from the tubular shaft 4,

said one way driving device incorporating a three armed cam disc A fixed on the tubular shaft 4 and rollers A which are inserted between the wall of a rim A on the drum A and the cam surfaces a a, a spring A being provided which tend to wedge the rollers A between the cam surfaces a, a a and the adjacent wall of the rim A. Thus the drum A is driven positively by the shaft 4 when the said shaft 4 is rotated in a (Cl. 235l44) counterclockwise direction as seen in Figure 3 and which is the direction of rotation during a registering operation, said drum A being free of the shaft 4 when this is rotated in a clockwise direction, see Figure 3, except for the drag which 5 is referred to hereinafter and which is made use of for returning the drum A to zero. The shillings and tens of shillings drums B and C are driven by interrupted toothed gearing consisting of the gear train a, 6-, 1, 1-, a, 9, 9-, III, In, iil II, the interrupted gears of the train being in the form of toothed plates 6' and 9' which are secured to their respective complementary discs 6 and 9 which in turn are secured to their respective drums A and B. The portions of the 1 tubular shaft 4 which are enveloped by the drums B and C are provided with elongated slots 4 4 which extend diametrically through the shaft 4 and through the slots 4', 4 and corresponding slots I3 II in sleeves H I3 90 mounted on the shaft 4 are passed pins l2, I!

of greater length than the external diameter of the tubular shaft 4 the projecting ends of the pins I2, I2 being disposed within recesses in collars l3, li which are slidably mounted on 25 the sleeves I3 and I3". The drums B and C have also associated therewith hubs each of which is provided with a pair of oppositely disposed holes within which are slidably mounted the stems of headed pins i4", l4 respectively. 30 These pinsfl, l4 co-operate with springs l5, l5 which are interposed between annular abutments l6, l6 screwed to the drums B and C (see Figure 2) and the closed ends of holes l4, 14 bored in the heads of the pins l4, l4 and 35 which normally tend to cause the ends of the shanks of the pins l4", l4 to engage within holes 8 and II respectively formed in the driving pinions 8 and ii for the respective drums B and C. The walls of the holes 8', ll' are chamfered 40 so as to facilitate engagement by the pins l4, l4. The heads of the pins i4, l4 co-operate with flanges l3, ii on the slidable collars l8, IS.

The drums A, B and C co-operate in known manner with pivotal stops ll, il I! which position the drums A, B and C in the zero position when zerolsing has been performed.

Disposed within the tubular shaft 4 is a plurality of lengths of rod It, It, 18 the ends whereof which are disposed within the tubular shaft 4 abutting the pins 12-, I2 associated to the aforesaid collars 13!, It, said rods being free to be moved longitudinally within the bore 5 of the tubular shaft 4 when it is required to put the drums in a condition for zeroising.

As illustrated in Figures 1 and 1 the longitudinal movement of the rods I8, I8 [8 is effected by the rotation of a handle [9 which in turn effects the rotation of a cam track 20 which co-operates with a roller 2| carried at the lower end of a lever 22 of the first order of levers, the upper end of which is provided with a pin 23 which abuts the outermost end of the length of rod I8. This handle IQ for every zeroising operation is turned through one complete revolution irrespective of the quantity measured at the preceding delivery. The rotation of the cam track 2!) involves the rotation of the zeroising shaft 24 which through the pinions 25 and 26 imparts the requisite zeroising movement to the shaft 4.

Normally the one way driving device hereinbefore described effects the driving of the drum A which ultimately transmits movement to the other drums through the interrupted toothed gearing.

When a zeroising operation is to be performed the rods l8, l8*, H! are displaced longitudinally within the bore of the shaft 4 and thereby caused to move the sliding collars l3, l3 along the shaft 4 in the direction away from the drum A. This movement of the sliding collars l3, I3 causes the flanges l3, l3 thereof to abut the heads of the pins l4, l4 and to withdraw the ends of the pins [4, l4 from the holes 8*, H in their respective associated driving pinions 8 and il against the resistance of the springs l5, l5". Upon the movement of the tubular shaft 4 in the direction of zeroising, i. e., clockwise as viewed in Figure 2, there is sufficient frictional drag be tween the cam surfaces a a (1. the rollers A and the wall of the rim A to carry the drum A to the zero position where it is retained by the stop l1, meanwhile the friction between the flanges l3, l3 on the collars l3, l3 and the heads of the pins l4, M carries the drums B and C with the tubular shaft 4 to the zero position.

When the zero position is attained the drums A, B and C are held by the pivotal stops I1 ll I! in the usual manner.

Upon the release of the rods l8, l8 l8 the collars I3 l3 are freed and allow the pins l4 i4 to re-engage within the registering holes 8, ll in the driving members 8 and II thus leaving the mechanism in readiness for a succeeding registering operation.

Where registering drums are employed both at the front and rear a common means can be employed for operating the push rods I8, i8 i8 simultaneously.

What I claim is:

1. A registering mechanism incorporating a plurality of drums, interrupted toothed gearing and complementary driving gears for connecting the drums in driving relationship whereby the drum of a higher denomination is driven from the preceding drum of lower denomination, a displaceable means for connecting the drums to the respective driving gears, and means for introducing frictional resistance when the aforesaid displaceable means has been actuated to disconnect the drums from the respective driving gears thereby placing the drums in a condition for being returned to the zero position.

2. A registering mechanism incorporating a rotatable driving shaft, indicating drums rotatably mounted on said shaft, an interrupted toothed gearing for driving a drum of higher denomination from the preceding drum of lower denomination, a one way driving connection between the drum of lowest denomination and the aforesaid shaft, complementary holes and pins for connecting a drum of one of the drums of higher denomination to its associated driving gear, spring means tending to maintain the engagement between the said pins and holes, and means for effecting a disengagement between the pins and holes when it is desired to put the drums in a condition for zeroizing whereby a frictional engagement between the drums and the driving shaft is created which permits the drums to be zeroised when the requisite motion is imparted to the said shaft.

3. A registering mechanism incorporating a rotatable tubular driving shaft, drums rotatably mounted on said tubular driving shaft, an interrupted toothed gearing for driving a drum of higher denomination from the preceding drum of lower denomination, a one way driving connection between the drum of lowest denomination and the aforesaid shaft, complementary holes and pins for connecting a drum of one of the drums of higher denomination to its associated driving gear, spring means tending to maintain the engagement between the said pins and holes, collars mounted on the tubular shaft and capable of a longitudinal displacement thereon whereby the said collars can be moved to disengage the pins from the holes, and means disposed within the tubular shaft for effecting the longitudinal displacement of the collars when it is desired to put the drums in a condition for zeroizing, the disengagement of the pins by the collars being resisted by the spring means whereby a frictional engagement between the drums and the tubular driving shaft is created which permits the drums to be zeroised when the zeroising movement is imparted to the said shaft.

4. A registering mechanism, according to claim 2, wherein each drum is provided with a relatively fixed abutment for the outer ends of the spring means and wherein the other ends of the spring means abut the pins and tend to move the pins into engagement with the complementary holes.

5. A registering mechanism, according to claim 2, wherein the one way driving means for the drum of lowest denomination introduces frictional resistance when an attempt is made to drive it counter to its driving direction thereby providing for the transmission of a zeroising movement to the said drum when the zeroisin motion is imparted to the shaft.

- JOHN FRASER. 

